87315642 has 24 divisors (see below), whose sum is σ = 189371520. Its totient is φ = 29076360.

The previous prime is 87315637. The next prime is 87315643. The reversal of 87315642 is 24651378.

87315642 is a `hidden beast` number, since 8 + 7 + 3 + 1 + 5 + 642 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 87315597 and 87315606.

It is not an unprimeable number, because it can be changed into a prime (87315643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24217 + ... + 27587.

It is an arithmetic number, because the mean of its divisors is an integer number (7890480).

Almost surely, 2^87315642 is an apocalyptic number.

87315642 is an abundant number, since it is smaller than the sum of its proper divisors (102055878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87315642 is a wasteful number, since it uses less digits than its factorization.

87315642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818 (or 4815 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 87315642 is about 9344.2839212002. The cubic root of 87315642 is about 443.6399869582.

The spelling of 87315642 in words is "eighty-seven million, three hundred fifteen thousand, six hundred forty-two".